Im playing with IguanaTinkersTweaks 1.7.10- 2.1.5 together with ExtraTic. I made an enderium cleaver and i didnt use any creative tool modifiers or anything BUT i did change the config so that it can become level 99. I also have the mod LevelUp installed on my client and that allows to increase all damage done by anything but when i swing my cleaver with a pretty big damage bonus from the LevelUp mod every once in a while the cleaver turns into a chicken and i need to do those /iamadirtycheater commands. Its just really annoying when it happens while in a boss battle, maybe it could be a config option so i can disable it?

EDIT: after further testing i found out that it just happens when my tool should level up from Legendary+ to the next level but it never levels since it turns into chicken before then, the LevelUp mod just allowed me to level up really fast which made it seem random